> Are you
sure it's the light pen header? The IBM CGA card has 2 header
> plugs on it, one fo the a light pen, the other for a modulator. The
> composite signal goes ot the latter.
On Fri, 25 Oct 2013, Philip Andrews
wrote:
There is a very good possibility I got the two
mixed up looking at the
board. They aren't labeled.
In the "early" days of MDA and CGA, "EVERY" video board had a 6 pin
light
pen connector. The boards that had that AND a 4 pin (composite and power)
connector were CGA. THAT was how you identified the boards!